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Abstract:

In Brief:

The authors sought to develop a methodology for obtaining and mapping the pressures occurring inside a “comfortable” ischial containment socket during gait for later use in studies of the perception of pressure magnitude. Pressure maps displaying the dynamics of socket pressure during gait in the muscle compartments and high pressure regions of the socket of one subject were developed. The maps revealed patterns that were in general agreement with those previously hypothesized, but some differences were found.

Abstract:

In Brief:

The authors sought to determine the subjective magnitudes of pressure perceived by a subject who used an ischial containment socket that was self-reported as “comfortable,” and to examine the relationships between perceived pressures and actual pressures. The authors conclude that subjective magnitudes may not accurately reflect actual pressures in some regions of the socket, and recommend additional research on the relationship between mode of pressure loading and perception of pressure, as well as the possible influence of quasi-hydrostatic loading on pressure sensation.

Abstract:

In Brief:

The purpose of this study was to determine the effect of a minimum control dynamic foot orthosis (DFO) on the locomotor skills of children with gross motor delays. The gross motor skills of 25 children were evaluated within 7 days with and without a DFO, and evaluations were repeated for 17 of the children following 2 months of wearing a DFO. Results of this study suggest that DFOs could play a significant role in improving the locomotor skills of children with gross motor delays.

Abstract:

In Brief:

This article presents a solution for individuals with limited knee flexion who are willing yet unable to ride a bicycle. The solution involves a bicycle adaptation that reduces the amount of knee flexion required to complete one 360° revolution of the crank arm while still allowing the rider to generate power with the affected side. The bicycle modification is independent of prostheses, thus allowing cycling and normal ambulation without modifications to the prosthesis. The hinged crank arm design may allow amputees and other orthopedic clients with limited knee flexion, to return to cycling or improve comfort during the activity.

Abstract:

In Brief:

To initiate a database on material properties of typical laminations used in prosthetic limb sockets, the authors subjected samples of common prosthetic laminations to tensile and bending tests. Eight varieties of lay-up materials (fibers) were each laminated separately with one of three common resins (matrix), resulting in 24 combinations of fiber/resin laminates. In addition to composition, the bending responses of various carbon fiber laminations were measured to evaluate the role of layer placement on bending strength. Results showed that formulations grouped into three categories based on mechanical strengths. These data provide a preliminary database of material strengths of typical laminations and suggest the utility of minimum standards for prosthetic laminations.